a(n) is the least number k such that the k-th difference between consecutive practical numbers, A179651(k), equals 2*n, or -1 if no such k exists.

A364706

a(n) is the least number k such that the k-th difference between consecutive practical numbers, A179651(k), equals 2*n, or -1 if no such k exists.

Terms

    a(0) =2a(1) =5a(2) =16a(3) =33a(4) =85a(5) =46a(6) =331a(7) =188a(8) =171a(9) =300a(10) =1986a(11) =962a(12) =3321a(13) =968a(14) =2316a(15) =6514a(16) =9974a(17) =3219a(18) =12162a(19) =3831a(20) =4588a(21) =20585a(22) =30099a(23) =22005a(24) =30465a(25) =33485a(26) =28874a(27) =35901a(28) =136396a(29) =48483

External references