A106360 Number of compositions of n with exactly 4 adjacent equal parts.

1, 0, 2, 9, 14, 33, 92, 189, 411, 926, 2016, 4219, 8935, 18805, 38808, 79928, 163963, 332676, 672036, 1352412, 2705019, 5385960, 10684650, 21105565, 41533076, 81467400, 159263257, 310372453, 603149241, 1168863180, 2259230907

Offset: 5

Author

Christian G. Bower, Apr 29 2005

Keywords

• nonn

Links

• A. Knopfmacher and H. Prodinger, On Carlitz compositions, European Journal of Combinatorics, Vol. 19, 1998, pp. 579-589.

Crossrefs

Column 4 of A106356. Cf. A003242.

Extensions

Replaced broken link, Vaclav Kotesovec, May 01 2014