48728domain: NAppears in sequencesGaps of 2 in sequence A038593 (upper terms).at n=25A038644First gap of n in sequence A038593 (lower terms).at n=40A038661Iccanobirt prime indices (11 of 15): Indices of prime numbers in A102121.at n=18A102141Row sums of triangle A141155.at n=20A141156Row sums of A163357 and A163359.at n=38A163365