A137937 A137904(n) - A137575(n).

0, 0, 3, 4, 5, 6, 7, 8, 9, 10, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86

Offset

0,3

Comments

To have 0 upon vertical 2, 10, 18, 36, 54, 86 (noble gases) is not a problem (with the help of A137583. A (second) 0 upon 1, 3, 11, 19, 37, 55, 87 (alkali metals), seems paradoxal. Is 120 terms (elements) sequence 0, 0, 1, 2, .. 117, 118 credible? This leads to a row 0 (0 upon hydrogen, 0 upon helium). Two common points with Janet periodic table elements.

60 terms: another, with A137913, theoritical companion to A137904.

Links

Table of n, a(n) for n=0..59.

Formula

A137913 prepended with 0, 0.

Crossrefs

Cf. A134984, A137575, A137904.

Sequence in context: A039165 A138220 A137913 * A260580 A297468 A047565

Adjacent sequences: A137934 A137935 A137936 * A137938 A137939 A137940

Keyword

nonn,fini,full

Author

Paul Curtz, Apr 30 2008

Status

approved