Number of nontrivial equivalence classes of S_n under the {1234,3412} pattern-replacement equivalence.

A330395

Number of nontrivial equivalence classes of S_n under the {1234,3412} pattern-replacement equivalence.

Terms

    a(0) =1a(1) =9a(2) =26a(3) =51a(4) =85a(5) =129a(6) =184a(7) =251a(8) =331a(9) =425a(10) =534a(11) =659a(12) =801a(13) =961a(14) =1140a(15) =1339a(16) =1559a(17) =1801a(18) =2066a(19) =2355a(20) =2669a(21) =3009a(22) =3376a(23) =3771a(24) =4195a(25) =4649a(26) =5134a(27) =5651a(28) =6201a(29) =6785

External references