Number of n X 1 (0,1,2) arrays of permanents of 2 X 2 subblocks of some (n+1) X 2 binary array.

A226845

Number of n X 1 (0,1,2) arrays of permanents of 2 X 2 subblocks of some (n+1) X 2 binary array.

Terms

    a(0) =3a(1) =9a(2) =23a(3) =57a(4) =145a(5) =373a(6) =957a(7) =2449a(8) =6267a(9) =16045a(10) =41083a(11) =105185a(12) =269297a(13) =689465a(14) =1765209a(15) =4519393a(16) =11570803a(17) =29624209a(18) =75845551a(19) =194184025a(20) =497160801a(21) =1272858861a(22) =3258844373a(23) =8343475473a(24) =21361432171a(25) =54690732373a(26) =140022269235

External references