Number of the essentially different permutations of the numbers 0 to n such that the sum of adjacent numbers is a square.

A108658

Number of the essentially different permutations of the numbers 0 to n such that the sum of adjacent numbers is a square.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =0a(13) =0a(14) =1a(15) =3a(16) =4a(17) =4a(18) =0a(19) =0a(20) =4a(21) =5a(22) =2a(23) =8a(24) =7a(25) =47a(26) =72a(27) =135a(28) =283a(29) =158

External references