A205136 Ordered differences of distinct pentagonal numbers.

4, 11, 7, 21, 17, 10, 34, 30, 23, 13, 50, 46, 39, 29, 16, 69, 65, 58, 48, 35, 19, 91, 87, 80, 70, 57, 41, 22, 116, 112, 105, 95, 82, 66, 47, 25, 144, 140, 133, 123, 110, 94, 75, 53, 28, 175, 171, 164, 154, 141, 125, 106, 84, 59, 31, 209, 205, 198, 188, 175

Offset

1,1

Comments

For a guide to related sequences, see A204892.

Links

Table of n, a(n) for n=1..60.

Example

a(1)=s(2)-s(1)=5-1=4
a(2)=s(3)-s(1)=12-1=11
a(3)=s(3)-s(2)=12-5=7
a(4)=s(4)-s(1)=22-1=21
a(5)=s(4)-s(2)=22-5=17

Mathematica

(See the program at A205138.)

Crossrefs

Cf. A205138, A204892.

Sequence in context: A269742 A151873 A354274 * A096735 A211458 A222284

Adjacent sequences: A205133 A205134 A205135 * A205137 A205138 A205139

Keyword

nonn

Author

Clark Kimberling, Jan 25 2012

Status

approved