Square roots of the perfect squares in A136360; or numbers k such that k^4 is in A133459 = the sums of two nonzero pentagonal pyramidal numbers.
A136361
Square roots of the perfect squares in A136360; or numbers k such that k^4 is in A133459 = the sums of two nonzero pentagonal pyramidal numbers.
Terms
- a(0) =3a(1) =5a(2) =31a(3) =132a(4) =1068a(5) =9672a(6) =50664a(7) =145060
External references
- oeis: A136361