A133605 Elements of A011185 that are also the sum of a pair of distinct elements of A011185.
3, 5, 8, 13, 21, 74, 95, 182, 212, 413, 862, 1060, 1435, 1934, 4447, 5323, 7588, 19934, 23725, 24970, 29558, 43344, 45425, 48622, 55240, 63835, 91336, 98178, 177387, 180356, 206088, 333837, 400924, 418503, 429115, 598604, 776150, 990510, 993089
Offset: 1
Keywords
Examples
A011185(1) = 1, A011185(2) = 2. 1 + 2 = 3 = A011185(3), hence 3 is in the sequence. A011185(16) = 212, A011185(35) = 1722. 212 + 1722 = 1934 = A011185(37), hence 1934 is in the sequence.
Links
- Klaus Brockhaus, Table of n, a(n) for n = 1..75
Programs
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Python
from itertools import count, islice def A133605_gen(): # generator of terms aset2, alist = set(), [] for k in count(1): bset2 = set() for a in alist: if (b:=a+k) in aset2: break bset2.add(b) else: if k in aset2: yield k alist.append(k) aset2.update(bset2) A133605_list = list(islice(A133605_gen(),30)) # Chai Wah Wu, Sep 11 2023
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