A145057 First differences of A031443.

2, 7, 1, 2, 23, 2, 1, 3, 1, 2, 5, 1, 2, 4, 79, 4, 2, 1, 5, 2, 1, 3, 1, 2, 7, 2, 1, 3, 1, 2, 5, 1, 2, 4, 11, 2, 1, 3, 1, 2, 5, 1, 2, 4, 9, 1, 2, 4, 8, 287, 8, 4, 2, 1, 9, 4, 2, 1, 5, 2, 1, 3, 1, 2, 11, 4, 2, 1, 5, 2, 1, 3, 1, 2, 7, 2, 1, 3, 1, 2, 5, 1, 2, 4, 15, 4, 2, 1, 5, 2, 1, 3, 1, 2, 7, 2, 1, 3, 1, 2, 5, 1

Offset

1,1

Comments

a(n) equals the differences between k where A145037(k) equals zero. - Reikku Kulon, Oct 02 2008

Links

David A. Corneth, Table of n, a(n) for n = 1..10000

Example

a(3) = A031443(3) - A031443(3-1) = 10 - 9 = 1. - David A. Corneth, Apr 26 2022

Mathematica

Differences[Select[Range[0, 1000], SameQ@@DigitCount[#, 2] &]] (* Paolo Xausa, Nov 16 2024 *)

Crossrefs

Cf. A031443, A145037.

Sequence in context: A324329 A340208 A201889 * A344930 A218792 A065254

Adjacent sequences: A145054 A145055 A145056 * A145058 A145059 A145060

Keyword

nonn,easy,base,changed

Author

Reikku Kulon, Sep 30 2008

Status

approved