A038337 Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*11^j.

1, 12, 11, 144, 264, 121, 1728, 4752, 4356, 1331, 20736, 76032, 104544, 63888, 14641, 248832, 1140480, 2090880, 1916640, 878460, 161051, 2985984, 16422912, 37635840, 45999360, 31624560, 11595672, 1771561, 35831808, 229920768

Offset

0,2

References

B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.

Links

Michael De Vlieger, Table of n, a(n) for n = 0..11475 (rows n = 0..150, flattened)

Bulat Khaidarov, Enumeration of Certain k-Block Partitions of Barry, J. Int. Seq. 29 (2026), Art. 26.2.8. See p. 6 (Table 2).

Mathematica

Table[Binomial[n, k]12^(n-k) 11^k, {n, 0, 10}, {k, 0, n}]//Flatten (* Harvey P. Dale, Aug 24 2019 *)

Crossrefs

Sequence in context: A171986 A254717 A195748 * A155825 A125509 A281251

Adjacent sequences: A038334 A038335 A038336 * A038338 A038339 A038340

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane

Status

approved