A319504 Indices of valleys (i.e. local minima) in A064800.
13, 17, 19, 25, 29, 31, 33, 37, 41, 43, 49, 53, 55, 57, 61, 65, 67, 71, 73, 79, 85, 89, 91, 97, 101, 103, 109, 113, 121, 127, 129, 131, 133, 137, 139, 141, 145, 149, 151, 157, 161, 163, 169, 173, 177, 181, 185, 191, 193, 197, 199, 201, 205, 209, 211, 217, 221, 223, 229, 233, 235, 239, 241, 244, 249, 251, 253, 257, 265, 269, 271, 277, 281, 283, 289, 293, 295, 298
Offset: 1
Keywords
Examples
A064800(13) is the first minimum in A064800: A064800(12) = 15, A064800(13) = 14 and A064800(14) = 16 and hence a(1) = 13.
Programs
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PARI
lista(nn) = {my(v = vector(nn, n, n + bigomega(n))); for (n=2, nn, if ((v[n] < v[n-1]) && (v[n] < v[n+1]), print1(n, ", ")););} \\ Michel Marcus, Sep 21 2018
Extensions
More terms from Michel Marcus, Sep 21 2018