A134409 Second differences of A006336.

0, 1, 1, 0, 2, 0, 3, 3, 0, 5, 5, 0, 8, 0, 11, 11, 0, 16, 0, 21, 21, 0, 29, 29, 0, 40, 0, 51, 51, 0, 67, 67, 0, 88, 0, 109, 109, 0, 138, 0, 167, 167, 0, 207, 207, 0, 258, 0, 309, 309, 0, 376, 0, 443, 443, 0, 531, 531, 0, 640, 0, 749, 749, 0, 887, 887, 0, 1054, 0, 1221, 1221, 0, 1428

Offset

1,5

Comments

a(n) = A006336(n+2)-2*A006336(n+1)-A006336(n) = A134408(n+1)-A134408(n);

apart from 0 same range as A006336;

A001950(n) = Min(m: a(m) = A006336(n)).

Links

Table of n, a(n) for n=1..73.

Crossrefs

Cf. A001950, A006336, A134408.

Sequence in context: A372817 A209693 A154344 * A327878 A337841 A298605

Adjacent sequences: A134406 A134407 A134408 * A134410 A134411 A134412

Keyword

nonn

Author

Reinhard Zumkeller, Oct 24 2007

Status

approved