Sequence s_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).

A129873

Sequence s_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).

Terms

    a(0) =2a(1) =3a(2) =8a(3) =13a(4) =38a(5) =64a(6) =196a(7) =337a(8) =1062a(9) =1851a(10) =5948a(11) =10468a(12) =34120a(13) =60488a(14) =199316a(15) =355369a(16) =1181126a(17) =2115577a(18) =7080928a(19) =12731141a(20) =42860534a(21) =77306428a(22) =261542752a(23) =473018396a(24) =1607076200a(25) =2913321828a(26) =9934255472a(27) =18045744424a(28) =61732449648a(29) =112340143632

External references