A283109 Increase in the number of free polyominoes from order n to n+1.

0, 0, 1, 3, 7, 23, 73, 261, 916, 3370, 12418, 46527, 174991, 663380, 2524605, 9652679, 37028654, 142514143, 550002180, 2128047718, 8252388728, 32068797010, 124855150040, 486952692675, 1902227344361, 7441861777311, 29153922116412, 114358089656116

Offset

0,4

Links

John Mason, Table of n, a(n) for n = 0..49

Formula

a(n) = A000105(n+1) - A000105(n).

Crossrefs

Cf. A000105.

Sequence in context: A228724 A191638 A148704 * A339284 A057184 A148705

Adjacent sequences: A283106 A283107 A283108 * A283110 A283111 A283112

Keyword

nonn

Author

Francois Alcover, Feb 28 2017

Status

approved