70225

Appears in sequences

• Crystal ball sequence for D_4 lattice.at n=11A007204
• a(n) = (9*n + 4)^2.at n=29A017210
• a(n) = (10*n + 5)^2.at n=26A017330
• a(n) = (11*n+1)^2.at n=24A017402
• a(n) = (12*n + 1)^2.at n=22A017534
• a(n+1) is smallest square > a(n) having no digits in common with a(n), with a(0) = 0.at n=26A030288
• Squares with initial digit '7'.at n=8A045791
• Indices of heptagonal numbers (A000566) which are also squares (A000290).at n=5A046195
• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 2, and a(3) = 4.at n=16A049962
• Smallest n-digit square starting with 7.at n=2A067477
• a(1) = 1; a(n) is the smallest square > a(n-1) which differs from it at every digit.at n=33A068854
• The smaller of a pair of powerful numbers (A001694) that differ by 2.at n=1A076445
• Sequence S_6 of the S_r family.at n=9A092184
• Numbers n that are the hypotenuse of exactly 12 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 12 ways.at n=27A097226
• Squares of the form 8p - 7, where p is prime.at n=36A110873
• Squares of the form 3S + 4, where S is a semiprime.at n=27A112630
• Left truncatable squares, ending in 5.at n=16A117246
• a(n) = A000931(n)^2.at n=26A133037
• Squares that remain squares when prefixed with a 9.at n=2A167044
• Squares that remains a square when some single digit is inserted in front of its decimal expansion.at n=22A167045