A203643 Number of arrays of n 0..12 integers with new values introduced in order 0..12 but otherwise unconstrained

1, 2, 5, 15, 52, 203, 877, 4140, 21147, 115975, 678570, 4213597, 27644437, 190899321, 1382958439, 10480136006, 82864611947, 682068020031, 5832484170844, 51717380273487, 474706578749477, 4503047451718545, 44074082550176545

Offset

1,2

Comments

Column 12 of A203647

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 79*a(n-1) -2783*a(n-2) +57695*a(n-3) -782133*a(n-4) +7284057*a(n-5) -47627789*a(n-6) +219409685*a(n-7) -703202566*a(n-8) +1519272964*a(n-9) -2082477528*a(n-10) +1606986720*a(n-11) -518918400*a(n-12)

Crossrefs

Sequence in context: A287673 A203642 A192867 * A192128 A203644 A203645

Adjacent sequences: A203640 A203641 A203642 * A203644 A203645 A203646

Keyword

nonn

Author

R. H. Hardin Jan 04 2012

Status

approved