The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A333662 Number of electrons per shell in element Z=n expressed as a 32-bit unsigned integer. 2
 1, 2, 6, 10, 14, 18, 22, 26, 30, 34, 98, 162, 226, 290, 354, 418, 482, 546, 2594, 4642, 4706, 4770, 4834, 2914, 4962, 5026, 5090, 5154, 3234, 5282, 7330, 9378, 11426, 13474, 15522, 17570, 148642, 279714, 281762, 283810 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This is a memory-efficient way of encoding the number of electrons per shell of all known elements. LINKS Zachary Russ, Table of n, a(n) for n = 1..118 EXAMPLE |-----|------------|------------|----------------------------------------| | | | | a(n) [bin] | | n | a(n) [dec] | a(n) [hex] | Electrons per Shell | | | | | Q | P | O | N | M | L | K | |-----|------------|------------|-----|-----|------|------|-----|----|---| | 1 | 1 | 0x00000001 | 0000 00000 000000 000000 00000 0000 01 | | 2 | 2 | 0x00000002 | 0000 00000 000000 000000 00000 0000 10 | | 3 | 6 | 0x00000006 | 0000 00000 000000 000000 00000 0001 10 | | 4 | 10 | 0x0000000a | 0000 00000 000000 000000 00000 0010 10 | | 5 | 14 | 0x0000000e | 0000 00000 000000 000000 00000 0011 10 | | 6 | 18 | 0x00000012 | 0000 00000 000000 000000 00000 0100 10 | | . | . | . | . | | . | . | . | . | | . | . | . | . | | 113 | 960562338 | 0x394104a2 | 0011 10010 100000 100000 10010 1000 10 | | 114 | 1228997794 | 0x494104a2 | 0100 10010 100000 100000 10010 1000 10 | | 115 | 1497433250 | 0x594104a2 | 0101 10010 100000 100000 10010 1000 10 | | 116 | 1765868706 | 0x694104a2 | 0110 10010 100000 100000 10010 1000 10 | | 117 | 2034304162 | 0x794104a2 | 0111 10010 100000 100000 10010 1000 10 | | 118 | 2302739618 | 0x894104a2 | 1000 10010 100000 100000 10010 1000 10 | |-----|------------|------------|----------------------------------------| PROG (C++) typedef unsigned char Shell; uint32_t a(Shell s1 = 0x0, Shell s2 = 0x0, Shell s3 = 0x0, Shell s4 = 0x0, Shell s5 = 0x0, Shell s6 = 0x0, Shell s7 = 0x0) {return (uint32_t)s1 + ((uint32_t)s2 << 2) + ((uint32_t)s3 << 6) + ((uint32_t)s4 << 11) + ((uint32_t)s5 << 17) + ((uint32_t)s6 << 23) + ((uint32_t)s7 << 28); } CROSSREFS Cf. A333997, A168208, A093907. Sequence in context: A122905 A132417 A103747 * A290490 A182991 A278568 Adjacent sequences: A333659 A333660 A333661 * A333663 A333664 A333665 KEYWORD fini,nonn,full AUTHOR Zachary Russ, Sep 02 2020 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 28 03:48 EDT 2023. Contains 361577 sequences. (Running on oeis4.)