121104

Appears in sequences

• a(n) = (9*n + 6)^2.at n=38A017234
• a(n) = (10*n + 8)^2.at n=34A017366
• a(n) = (11*n + 7)^2.at n=31A017474
• a(n) = (12*n)^2.at n=29A017522
• Smallest nontrivial extension of n-th square which is a square not ending 00.at n=10A030688
• Largest square less than or equal to sum of previous terms.at n=20A061886
• Collatz-2 (A063041) trajectory starting at 29.at n=8A063044
• Collatz-2 (A063041) trajectory starting at 29.at n=23A063044
• Collatz-2 (A063041) trajectory starting at 29.at n=38A063044
• Largest value in Collatz-2 (A063041) trajectory starting at n.at n=27A063045
• Numbers m such that A062401(m) = phi(sigma(m)) is increasing to a record value, i.e., A062401(m) represents a new peak, so that A062401(m) > A062401(k) for all k < m.at n=40A065391
• Square associated with twin primes (p,p+2): p(p+2) + 1. Square of the average of twin primes.at n=20A075369
• Smallest initial values leading to fixed points listed in A077092.at n=8A077093
• Smaller of the two successive squares which differ in the use of only one digit.at n=32A078187
• a(n) = x^2 = A090116(n)^2 is the least square that is "surrounded" by two closest primes, by prevprime(x^2) and nextprime(x^2) whose difference nextprime - prevprime = 2n.at n=20A090117
• Squares of the form n+prime(n).at n=36A104992
• Squares for which the sum of the digits, the product of the digits, the digital root and the multiplicative digital root are all squares.at n=24A117680
• a(n) = (29*n)^2.at n=12A133496
• Perfect squares in A133459; or perfect squares that are the sums of two nonzero pentagonal pyramidal numbers.at n=21A136359
• Squares whose decimal expansion contains no digit greater than 4.at n=32A158082